Finding the Fourth Proportional to 1,195.34, 1,649.42 and 664.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,195.34 : 1,649.42 = 664.10 : x
2. Step 2: Convert to fraction form
   1,195.34/1,649.42 = 664.10/x
3. Step 3: Cross multiply
   1,195.34x = 1,649.42 × 664.10
4. Step 4: Simplify right side
   1,195.34x = 1,095,379.82
5. Step 5: Solve for x
   x = 1,095,379.82/1,195.34
6. Step 6: Final answer
   x = 916.38